Twyer for blast-furnaces and converters.



` alwmsoN'. TWYER'TOB. .BLAST FUBNUES .AND CONTERTBBS.

APPLICATION FILEDJUNE 24, 1908.

Patented Feb. 9,1909.-

1HE NnRms PETERS co., wlsmwz'rorvE n.1; t

UNiTnn STATES PATENT orricn OYRUS-i ROBINSON, OF MOUNT VERNON, NEW YORK.

TWYER FOR BLAST-FURNACES AND CONVERTER/S.

To all whom fit mayconcefr'n:

Be it known that I, Ornus ROBINSON, a subject of Great Britain, residingat Mount Vernon, in the county of lestchester and State of New York,have invented certain new and useful improvements in Twyers forBlast-Furnaces and Converters, of which the following is a specication.

My invention relates to improvements in blast furnace and convertertwyers.

The primary object of my invention is to provide a twyer which willavoid the hitherto frequent destructive fires resulting from the contactof the hot slag with the explosive gases and air in the twyer.

Secondary objects are to provide a twyer with a simple and effectivevalve for closing the barring or punch-rod hole and one which opensautomatically when the air blast is cut off, and a simple, free andcertain escape for the hot slag when it runs from the furnace.

I attain these objects by the constructions below described and shown onthe accompanying drawings, in which Figure 1 shows my improved twyer secured to a furnace; Fig. 2 is a vertical section, and Fig. 3 is a frontelevation.

l represent-s the side of a furnace with my improved twyer securedthereto.

2 represents the body portion of my twyer, the bottom of which isconstructed at a sharp downward angle from a point near the furnaceopening and is curved soas to forth a partially tubular channel or ductfor the slag terminating in thetubular outlet 5. This tubular end 5 isscrew threaded on the outside to receive the internally screw threadedcap l0, which latter is provided with .an annular shoulder for holdingthe fusible disk 9 firmly against the end of the tube 5 and over theopening in the end thereof when the said cap is screwed into place.

The barring hole is fitted with a bushing 6 of brass or other suitablemetal, the cylindrical opening in which tapers inwardly at its inner endso as to receive and seat the conical valve 7 when the latter is pulled`into position by means of the chain 8, thus renp Specification ofLetters Patent. Application filed June 24;, 1908. Serial No. 440,063.

Patented Feb. 9, 1909.

dering the twyer air tight. The valve 7 is held in position in thebarring hole by the air pressure from the blast, and as Soon, therefore,as the blast is sufficiently reduced, the valve automatically falls intothe twyer, thus opening the barring hole through which the gasesescaping from the furnace immediately and freely flow into the outsideatmosphere where there is no longer danger of their ignition.

By constructing the twyer with the bottom inclined from a point near thefurnace `opening to the slag outlet the hot slag running out of thefurnace is immediately car* ried by the action of gravity to the fusiblestopper which is melted, thus allowing the slag to run freely from thetwyer. The vpressure of the air being diminished the valve falls in andthe gases rush out into the atmosphere instead of mixing with the air inthe twyer and bustle pipe, and thus the danger of explosions from theignition of the confined gases by the hot slag is avoided.

What I claim is:

1. A twyer for blast furnaces and converters provided with a valve forthe barring hole automatically releasable by the diminution of the airpressure.

2. ln a twyer provided with a barring hole, a valve for the barring holeand a flexible attachment to the valve extending with-y out the twyerfor bringing said valve into coperation with said hole so as to closethe same.

3. A twyer provided with abarring hole, a valve for the same, adapted tobe retained therein by the air pressure within the twyer and to bereleased upon the diminution thereof, and means for closing said barringhole with said valve from without the twyer.

4. In a twyer provided with a barring hole and a valve within the twyerfor closing the same, means for closing said barring hole Vwith saidvalve from without the twyer.

OYRUS ROBINSON.

Witnesses:

FRANCIS RISK, J. WARREN BIRD.

